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Messages to the driver

The communication between the program and the driver allows the driver to be called with special messages - and no object. The current list of obligatory messages the driver must respond to is as follows:

Driver initialisation. If the driver is installed before DSPACK initialisation - then another INIT call will be sent after DSPACK initialisation. The driver may check whether DSPACK has been initialised by calling integer function ids_done(ierr) - it returns 1 if DSPACK has been initialised and 0 otherwise.
Driver should write it's identification message on unit lun - used to list installed drivers.
Identification request. pnt is a pointer to a character variable and the driver should copy it's name into that variable. This is the only mechanism available for the system to associate the class name with class number.

Fri Nov 4 01:19:29 MET 1994